Battery-testing instrument



Aug. M, 11923. 1154645714 (3. w. TERRY BATTERY 'rns'rme INSTRUMENT Filed Oct. 31 1919 awwwtoz Char Z (5 W'ZV/j/ 3% WW {W L/VW Patented Aug, Id, 1923,

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Appliwtlon filed @etoher er, rare. serial in. states.

To all whom it may concern: Be it own that I, Cs W. Y, acitizen of the United States of erica, 11111,: at Detroit, in the county of Wayne 0 and State of Michigan, have invented certain new and useful Improvements in Battery-Iesting Instruments, of which the following is a specification, reference being had therein to the accompan drawings.

The invention relates to instruments designed iorthe testing of storage batteries and more particularly to indicate an abnormal condition in any of the cells. It'is the object ofthe invention to obtain a portable I15 ent which can be easily manipulated in the test of the batteries and which has various advantages as hereinafter set forth.

In the w:

I is a perspective view of the instren Figure 2 is a front elevation thereof hav-' m w a; "f a we Ilit being d. p

In the present state of the art one method of test batteries for the indication of trouble or defects therein is to connect into circuit between the poles of the battery a hown resistance having a voltmeter in shunt therewith. Usually the voltmeter and resistor are located in peanent position and are coupled with a battery through flexible connectors hav 1;; prods at their ends which may be pd intothe soft metal battery te a rials. To simplify the mnstruction and to facilit the test operation I have de a mlf-contained instent in -ich the voltmeter, resistor and rods are in fixed relation to each other an to a handle for mption. The spacing of e prods is such that they may be sultaneousl ti 1;" with battery terminals, and the a e a convenient means for manipulation. the voleter isso lo cated that it may be rd by the oper while the pr are held upon the tena out with a battery which is ni data, and as shown in the drawing, a and B are prods having shar points at their lower ends and which at their upeasily read by the operator.

per ends are mechanically secured to a r as a shunt circuit conta the voltmeter E; This voltmeter is preferably of a double act- I ing type having a zero position, so that readings may be taken regardless of'the arrangement of teals with which the prods are engaged. The voltmeter is also mechanically supported bythe prods with its dial facing upward so-that it may be In use, the operator grasping the handle C in one hand can press the pointed prods into the terminals of the cells, which in discharging current through the resistor D will indicate by the voltage the condition of the cell. The operator may quickly transfer the eagement from cell to cell and as there are no flexible conductors or connections to be made, there is nothing to delay the test.

What I claim as my invention is:

I. A battery tester, comprising a pair of prods in fixed relation to each other, a bandle to which said prods are attached, and a resistor and voleter mounted betweensaid prods.

'2. A battery tester, comprising a pair of prods, a handle extending transversely between the upper ends of said rods d to which the latter are secured in xed relation to each other, and av resistor and voltmeter mounted between said prods.

3. A battery tester, comprising a pair of prods, a handle extending transversely between said prods and to which they are secured in fixed relation to each other, a volt meter arrad between the prods beneath the handle having its dial facing upward, and a resistor exteng between the ML:

4. A battery testing instrument, comprising a pair of rods sharned at their lower ends, an ins at han ending transversely between the upper ends of said 3 rods, a voltmeter arranged between the are, be ing mechcally supported thereby and electrically connected therebetween, and a resistor also connected between the pr.

5. A battery tester comprising a pair of m ll: sread a art at their upper ends and rntowar s each other in adownward direction, a handle between the upper ends of said p, a voltmeter mounted between said pr '05s beneath said handle and in a po sition to be read horn the top, and a re- 11% r between said pr I r 6. A battery tester comprising a pair of said prods, holding the same in fixed relaprods spread apart at 'their'upper: ends and tion, a voltmeter between said prods beneath inclining towards each v other in .a, downsaid handle and in a position to be read from no ward direction, the lower ends of said prods the top, and a resistor also between said 5 being sharpened and being spaced at distance prods. 1 1

convenient for engagement with battery ter- In testimony whereof I aflix my signature. minals, a handle between the upper ends of 7 CHARLES W. TERRY. 

